US20180250660A1 - Method for preparing the nano-porous oxide-noble metal composite material by deoxidation - Google Patents
Method for preparing the nano-porous oxide-noble metal composite material by deoxidation Download PDFInfo
- Publication number
- US20180250660A1 US20180250660A1 US15/626,127 US201715626127A US2018250660A1 US 20180250660 A1 US20180250660 A1 US 20180250660A1 US 201715626127 A US201715626127 A US 201715626127A US 2018250660 A1 US2018250660 A1 US 2018250660A1
- Authority
- US
- United States
- Prior art keywords
- oxide
- noble metal
- nano
- composite material
- porous
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 43
- 229910000510 noble metal Inorganic materials 0.000 title claims abstract description 41
- 239000002905 metal composite material Substances 0.000 title claims abstract description 16
- 239000002244 precipitate Substances 0.000 claims abstract description 20
- 238000003756 stirring Methods 0.000 claims abstract description 18
- 239000011259 mixed solution Substances 0.000 claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 14
- 150000005324 oxide salts Chemical class 0.000 claims abstract description 7
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 239000004094 surface-active agent Substances 0.000 claims abstract description 5
- 238000001354 calcination Methods 0.000 claims abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 57
- 239000000243 solution Substances 0.000 claims description 33
- 239000000843 powder Substances 0.000 claims description 15
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 15
- 239000012498 ultrapure water Substances 0.000 claims description 15
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 9
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000010931 gold Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000005530 etching Methods 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000005751 Copper oxide Substances 0.000 claims description 2
- 238000002441 X-ray diffraction Methods 0.000 claims description 2
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 2
- 229910000431 copper oxide Inorganic materials 0.000 claims description 2
- 239000008103 glucose Substances 0.000 claims description 2
- 150000002500 ions Chemical class 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 2
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical group [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 2
- 229910052763 palladium Inorganic materials 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 229910052697 platinum Inorganic materials 0.000 claims description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims 1
- 150000004706 metal oxides Chemical class 0.000 claims 1
- 150000003839 salts Chemical class 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000010419 fine particle Substances 0.000 abstract 1
- 238000000227 grinding Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 239000002131 composite material Substances 0.000 description 31
- 230000003197 catalytic effect Effects 0.000 description 14
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 14
- 238000005406 washing Methods 0.000 description 13
- 238000005260 corrosion Methods 0.000 description 12
- 230000007797 corrosion Effects 0.000 description 12
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 description 10
- 229910045601 alloy Inorganic materials 0.000 description 9
- 239000000956 alloy Substances 0.000 description 9
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 9
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 9
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 description 7
- 239000002923 metal particle Substances 0.000 description 7
- 238000001556 precipitation Methods 0.000 description 7
- 229910001961 silver nitrate Inorganic materials 0.000 description 7
- OERNJTNJEZOPIA-UHFFFAOYSA-N zirconium nitrate Chemical compound [Zr+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O OERNJTNJEZOPIA-UHFFFAOYSA-N 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 239000002243 precursor Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000002082 metal nanoparticle Substances 0.000 description 3
- 239000002105 nanoparticle Substances 0.000 description 3
- 239000010970 precious metal Substances 0.000 description 3
- 229910021607 Silver chloride Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- -1 cerium oxide-silver chloride Chemical compound 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910017566 Cu-Mn Inorganic materials 0.000 description 1
- 229910017871 Cu—Mn Inorganic materials 0.000 description 1
- 229910015711 MoOx Inorganic materials 0.000 description 1
- 229910003286 Ni-Mn Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005287 template synthesis Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/03—Precipitation; Co-precipitation
- B01J37/031—Precipitation
- B01J37/033—Using Hydrolysis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/66—Silver or gold
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/864—Removing carbon monoxide or hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/48—Silver or gold
- B01J23/52—Gold
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/63—Platinum group metals with rare earths or actinides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
- B01J23/8906—Iron and noble metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
- B01J23/8926—Copper and noble metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
- B01J23/8933—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/894—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with rare earths or actinides
-
- B01J35/0026—
-
- B01J35/0033—
-
- B01J35/004—
-
- B01J35/1057—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/20—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state
- B01J35/23—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/391—Physical properties of the active metal ingredient
- B01J35/393—Metal or metal oxide crystallite size
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
- B01J37/0225—Coating of metal substrates
- B01J37/0226—Oxidation of the substrate, e.g. anodisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/06—Washing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/206—Rare earth metals
- B01D2255/2065—Cerium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/502—Carbon monoxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Definitions
- the present invention relates to the field of the nano-porous oxide-noble metal composite material, and more particularly to a method for preparing the nano-porous oxide-noble metal composite material by deoxidation.
- the noble metal nanoparticles have excellent catalytic properties, and the porous composite material composed of the noble metal contained in the oxide has many special advantages, such as high thermal stability, large specific surface area, low density, interconnected internal channels and good adsorption and the permeability, other aspects of the sensor, energy storage and conversion, CO catalytic oxidation, and photocatalysis, and have a wide range of applications.
- the oxide pore walls and noble metal particles can play a better synergy: on the one hand, due to the obstruct by the pore walls of high melting point, the dispersion and thermal stability of the metal nanoparticles are enhanced; on the other hand, the binding surface of the nano-scale oxide and the noble metal can produce a strong interaction effect, which will increase the active points of the composite material and enhance significantly the catalytic performance. Therefore, nano-porous oxide-precious metal composite material have been widely concerned, which are the hot spots of research in recent years.
- the methods for preparing the nano-porous oxide-noble metal composite material mainly include the template method and the dealloying method.
- the porous template is synthesized by chemical means firstly, which is divided into the soft template and the hard template, then the precursor metal ions are infused by impregnation method, the porous template is thermally decomposed by heat treating after drying, to form the porous oxide, and finally the metal particles are loaded in the porous oxide.
- the dealloying method is essentially the corrosion and decomposition of the alloy, which has become an important method for studying nano-porous metal material at present.
- the active elements of the alloy containing multiple components are removed during the corrosion, and the remaining inert elements constitute the porous metal structure.
- the method is simple and suitable for large-scale production.
- high temperature melting or electrodeposition, magnetron sputtering and the like can be used, and then it is etched into porous metal structure by the chemical or electrochemical.
- the preparation of nano-porous metal composite material containing oxides by the dealloying method has been extensively studied.
- the oxide element is also retained during the formation of metal porous structure by the design of the appropriate alloy and the use of the corresponding corrosion method.
- the composite material is formed after heat treatment, and the catalytic activity and thermal stability are significantly enhanced.
- porous composite materials based on rare precious metal are costly and difficult to widely used in some areas. If the low oxide as the matrix, precious metals as the added components, it will be an important development trend which significantly reduces costs under the enhanced catalytic performance.
- the dealloying method for preparing the nano-porous oxide includes firstly obtaining porous metal and then oxidizing the porous metal to porous oxide. In another method, some elements do not decompose in the dealloying process, but a part of or all are oxidized to form a porous structure. However, during the the formation of the nano-porous structure, a part of the oxide will be attached to the solid-liquid interface after the formation, preventing the corrosion, while the oxide distribution in the internal is uneven. After the formation of nano-porous oxide and loading it with metal particles, there will be blocking of holes and uneven distribution of metal particles. In addition, in the precursor alloy preparation process, energy consumption is high during the high temperature smelting into the alloy, and the phase structure is complex, or leads to poor pore structure uniformity.
- Gao et al. made the dealloying of the melt rapidly quenched Ni—Cu—Mn alloy in ammonium sulfate solution to obtain nano-porous Ni—Mn alloy after the Cu element is dissolved, and then use electrochemical oxidation to form nano-porous oxide-metal composite material.
- Ye et al. reported that the element of Al is dissolved during Ti—Mo—Al alloy corroded in the sodium hydroxide solution, and that the remaining elements of Ti and Mo form porous TiO 2 /MoO x complex. If the alloy contains noble metals, the nano-porous oxide-noble metal composite material will be formed after the dealloying.
- the above methods have some drawbacks, for example, the template synthesis process is complex, time-consuming, requires inert gas protection or vacuum conditions in the reaction process, is not suitable for large-scale production, and needs a large number of organic solvents, causing some pollution to the environment.
- the noble metal particles are loaded by the impregnated method, this “outside to inside” approach will inevitably lead to a part of the holes being blocked, and thus the specific surface areas will decrease significantly.
- the distribution of metal particles is uneven, and the bonding strength of oxide and metal is relatively weak.
- the technical problems solved by the present invention is that the noble metal nanoparticles are formed in-situ in the nano-porous oxide by the method of the decomposition of the oxide precursor, which overcomes the defects such as the low porosity and uneven composition caused by the template method and the dealloying method, and obtains the oxide-based composite material having good uniformity, simple process, good catalytic performance.
- S1 based on the weight components, 0.1243-1.243 parts of the noble metal ions or particles (e.g., silver nitrate, gold nanoparticles), 3.9484-4.5559 parts of the oxide salt to be dissolved (e.g., copper nitrate, etc.), 2.8148-3.7835 parts of the target oxide salt (e.g., cerium nitrate, zirconium nitrate, etc.) are dissolved in 200 ml of ultrapure water to form a mixed solution, and into which 0.2-0.25 parts of the surfactant (PVP) is added, followed by stirring magnetically for 5-10 minutes;
- PVP surfactant
- the said complex is sufficiently etched with an etchant, dissolving a part of the oxides, reserving the noble metal and the target oxide, separating and washing it, drying at 80-85° C. and heat treating at 400° C. after complete reaction, to obtain the nano-porous noble metal composite material.
- the resulting porous composite material is an oxide matrix, and whose noble metal content is 1 to 30 wt %.
- the noble metal is silver, gold, platinum and palladium.
- the target oxide is cerium oxide, zirconium oxide, titanium oxide, lanthanum oxide and the like.
- the dissolved oxide is copper oxide, aluminum oxide, iron oxide and the like.
- the surfactant is 2 wt % PVP.
- the precipitant is a sodium hydroxide solution
- the sodium hydroxide solution is prepared by dissolving 3 g of sodium hydroxide in 50 ml of ultrapure water.
- the etchant is selected from the group consisting of dilute hydrochloric acid or dilute sulfuric acid, at a mass concentration of 5-6 wt %.
- the XRD analysis phase is used, and if the noble metal participates in the reaction during the etching process, it is necessary to further reduce the noble metal.
- the reducing method is: dispersing the dried powder in a 2 wt % sodium hydroxide solution, and gradually adding 5 wt % of the glucose solution to an excess, reacting for 4 hours, reducing the noble metal involved in the reaction to produce a simple substance of noble metal, and then proceeding cleaning, drying and heat treating at 400° C.
- the nano-porous oxide-noble metal composite material prepared by the method of the decomposition of the oxide precursor according to the present invention has the advantages of simple operation, low energy consumption and environmental protection, and is suitable for batching, compared with the conventional template method and the dealloying method.
- the conventional reagents such as sodium hydroxide are used to subside the metal ions, do not need a lot of organic solvents, which also cause the pollution to the environment; dilute hydrochloric acid, dilute sulfuric acid and the like are used during corrosion, which is simple operation, suitable for batch preparation.
- the composite material itself is well-homogeneous, and the noble metal particles are formed in-situ in the porous oxide, and the interface strength is high. It is possible to avoid the defects, such as the uneven corrosion by the dealloying method and the clogging of holes and the decrease of the specific surface area and the like by the template method.
- FIG. 1 is XRD spectrums of the complex of CeO 2 /CuO/Ag before corrosion (a) and after corrosion (b).
- FIG. 2 is a electron photographs of the scanning (a, b) and transillumination (c, d) of the nano-porous CeO 2 —Ag (5%) composite material prepared according to example 1 of the present invention.
- FIG. 3 shows the catalytic oxidation of CO in performance of nano-porous CeO 2 —Ag composite material with different silver contents.
- FIG. 4 shows the catalytic oxidation of CO in stable performance of nano-porous CeO 2 —Ag (10%) composite material with different silver contents for 60 hours.
- Example 1 Preparing for Nano-Porous CeO 2 —Ag (5 wt. %) Composite Material
- 0.1243 g of silver nitrate, 4.5559 g of copper nitrate and 3.7835 g of cerium nitrate were dissolved in 200 ml of ultrapure water to form a mixed solution, and into which 0.2 g of PVP was added, followed by stirring magnetically for 10 minutes.
- 3 g of sodium hydroxide was dissolved in 50 ml of ultra-pure water to produce a precipitant, which gradually was dropped in the mixed solution, forming the precipitation rapidly, and continued to stir for 4 h. After the precipitate was centrifuged and washed, it was dried at 80° C. for 12 h. And then the dried precipitate was calcined at 500° C.
- the complex was sufficiently etched in 5 wt % dilute hydrochloric acid, and the solution gradually became blue. After separating and washing it, the solution was dried at 80° C. (the XRD indicates that the nano-porous cerium oxide-silver chloride complex was formed).
- the powder was dispersed in the 2 wt % sodium hydroxide solution, and a 5 wt % dextrose solution was added dropwise to cause an excess. After reacting for 4 h, washing, drying and heat treating the powder at 400° C. produced the nano-porous CeO 2 —Ag (5 wt %) composite material.
- Example 2 Preparing for Nano-Porous CeO 2 —Ag (30 wt. %) Composite Material
- 0.8772 g of silver nitrate, 3.9484 g of copper nitrate and 3.2791 g of cerium nitrate were dissolved in 200 ml of ultrapure water to form a mixed solution, and into which 0.21 g of PVP was added, followed by stirring magnetically for 10 minutes.
- 3 g of sodium hydroxide was dissolved in 50 ml of ultra-pure water to produce a precipitant, which gradually was dropped in the mixed solution, forming the precipitation rapidly, and continued to stir for 4 h. After the precipitate was centrifuged and washed, it was dried at 82° C. for 12 h. And then the dried precipitate was calcined at 500° C.
- Example 3 Preparing for Nano-Porous CeO 2 —Ag (10 wt. %) Composite Material
- 0.2953 g of silver nitrate, 4.559 g of copper nitrate and 3.7835 g of cerium nitrate were dissolved in 200 ml of ultrapure water to form a mixed solution, and into which 0.24 g of PVP was added, followed by stirring magnetically for 10 minutes.
- 3 g of sodium hydroxide was dissolved in 50 ml of ultra-pure water to produce a precipitant, which gradually was dropped in the mixed solution, forming the precipitation rapidly, and continued to stir for 4 h. After the precipitate was centrifuged and washed, it was dried at 85° C. for 12 h. And then the dried precipitate was calcined at 500° C.
- Example 4 Preparing for Nano-Porous ZrO 2 —Ag (30 wt. %) Composite Material
- the complex was sufficiently etched in 6 wt % dilute hydrochloric acid, and the solution gradually became blue. After separating and washing it, the solution was dried at 80° C. The powder was dispersed in a 2 wt % sodium hydroxide solution, and a 5 wt % dextrose solution was added dropwise to cause an excess. After reacting for 4 h, washing, drying and heat treating the powder at 400° C. produced the nano-porous CeO 2 —Zr (30 wt %) composite material.
- Example 5 Preparing for Nano-Porous CeO 2 —Au (3 wt. %) Composite Material
- 0.1243 g of silver nitrate, 4.5559 g of copper nitrate and 3.7835 g of cerium nitrate weredissolved in 200 ml of ultrapure water to form a mixed solution, and into which 0.21 g of PVP was added, followed by stirring magnetically for 10 minutes.
- 3 g of sodium hydroxide was dissolved in 50 ml of ultra-pure water to produce a precipitant, which gradually was dropped in the mixed solution, forming the precipitation rapidly, and continued to stir for 4 h. After the precipitate was centrifuged and washed, it was dried at 85° C. for 12 h. And then the dried precipitate was calcined at 500° C.
- Example 6 Preparing for Nano-Porous ZrO 2 —Au (18 wt. %) Composite Material
- the XRD spectrums of the complex of CeO 2 /CuO/Ag before corrosion (a) and after corrosion (b) are shown in FIG. 1 .
- the phase structure is CuO—CeO 2 —Ag complex before corrosion, and mainly containing CeO 2 and Ag after corrosion, indicating that the CeO 2 based composite material obtained.
- FIG. 2 The electron photographs of the scanning (a, b) and transillumination (c, d) of the nano-porous CeO 2 —Ag (5%) composite material prepared according to example 2 are shown in FIG. 2 , wherein 2a and 2b are photographs of different magnification. It can be seen that the material is a homogeneous porous structure and the pore walls are nanoparticles. It can be seen more clearly from the transmitted photographs of FIGS. 2 c and 2 d that it is the micrographs. Where CeO 2 is interconnected to construct a porous structure with 10 nm, the microparticles are of about 10 nm. Wherein the Ag nanoparticles are embedded in the porous structure and have a size of about 60 nm.
- FIG. 3 shows the catalytic oxidation of CO in performance of nano-porous CeO 2 —Ag composite material prepared in examples 1, 2 and 3, and from which it can be seen that the catalytic effect is enhanced with the increasing of Ag content, in which the catalytic effect of CeO 2 —Ag (10 wt. %) is better, and the temperature of 50% conversion is 131 degrees Celsius. But with the further increase in silver content, low temperature catalytic effect is poor, and the high temperature catalytic effect is not different significantly.
- FIG. 4 shows the catalytic oxidation of CO in stable performance of nano-porous CeO 2 —Ag (10%) composite material with different silver contents for 60 hours. It can be seen from FIG. 4 that the CeO 2 —Ag (10 wt. %) material has no attenuation at 300° C. after 65 hours, indicating that the oxide-based noble metal composite material prepared by this method has a good stability.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Catalysts (AREA)
- Nanotechnology (AREA)
Abstract
Description
- This application claims priority to Chinese Patent Application No. 201710124757.5 with a filing date of Mar. 3, 2017. The content of the aforementioned applications, including any intervening amendments thereto, are incorporated herein by reference.
- The present invention relates to the field of the nano-porous oxide-noble metal composite material, and more particularly to a method for preparing the nano-porous oxide-noble metal composite material by deoxidation.
- The noble metal nanoparticles have excellent catalytic properties, and the porous composite material composed of the noble metal contained in the oxide has many special advantages, such as high thermal stability, large specific surface area, low density, interconnected internal channels and good adsorption and the permeability, other aspects of the sensor, energy storage and conversion, CO catalytic oxidation, and photocatalysis, and have a wide range of applications. The oxide pore walls and noble metal particles can play a better synergy: on the one hand, due to the obstruct by the pore walls of high melting point, the dispersion and thermal stability of the metal nanoparticles are enhanced; on the other hand, the binding surface of the nano-scale oxide and the noble metal can produce a strong interaction effect, which will increase the active points of the composite material and enhance significantly the catalytic performance. Therefore, nano-porous oxide-precious metal composite material have been widely concerned, which are the hot spots of research in recent years.
- At present, the methods for preparing the nano-porous oxide-noble metal composite material mainly include the template method and the dealloying method. Using the template method, the porous template is synthesized by chemical means firstly, which is divided into the soft template and the hard template, then the precursor metal ions are infused by impregnation method, the porous template is thermally decomposed by heat treating after drying, to form the porous oxide, and finally the metal particles are loaded in the porous oxide.
- Another method for preparing the nano-porous oxide-noble metal composite material is the dealloying method. The dealloying method is essentially the corrosion and decomposition of the alloy, which has become an important method for studying nano-porous metal material at present. The active elements of the alloy containing multiple components are removed during the corrosion, and the remaining inert elements constitute the porous metal structure. The method is simple and suitable for large-scale production. For the preparation of precursor alloys, high temperature melting or electrodeposition, magnetron sputtering and the like can be used, and then it is etched into porous metal structure by the chemical or electrochemical. Recently, the preparation of nano-porous metal composite material containing oxides by the dealloying method has been extensively studied. The oxide element is also retained during the formation of metal porous structure by the design of the appropriate alloy and the use of the corresponding corrosion method. The composite material is formed after heat treatment, and the catalytic activity and thermal stability are significantly enhanced. However, porous composite materials based on rare precious metal are costly and difficult to widely used in some areas. If the low oxide as the matrix, precious metals as the added components, it will be an important development trend which significantly reduces costs under the enhanced catalytic performance.
- The dealloying method for preparing the nano-porous oxide includes firstly obtaining porous metal and then oxidizing the porous metal to porous oxide. In another method, some elements do not decompose in the dealloying process, but a part of or all are oxidized to form a porous structure. However, during the the formation of the nano-porous structure, a part of the oxide will be attached to the solid-liquid interface after the formation, preventing the corrosion, while the oxide distribution in the internal is uneven. After the formation of nano-porous oxide and loading it with metal particles, there will be blocking of holes and uneven distribution of metal particles. In addition, in the precursor alloy preparation process, energy consumption is high during the high temperature smelting into the alloy, and the phase structure is complex, or leads to poor pore structure uniformity.
- For example, Gao et al. made the dealloying of the melt rapidly quenched Ni—Cu—Mn alloy in ammonium sulfate solution to obtain nano-porous Ni—Mn alloy after the Cu element is dissolved, and then use electrochemical oxidation to form nano-porous oxide-metal composite material. For example again, Ye et al. reported that the element of Al is dissolved during Ti—Mo—Al alloy corroded in the sodium hydroxide solution, and that the remaining elements of Ti and Mo form porous TiO2/MoOx complex. If the alloy contains noble metals, the nano-porous oxide-noble metal composite material will be formed after the dealloying.
- However, the above methods have some drawbacks, for example, the template synthesis process is complex, time-consuming, requires inert gas protection or vacuum conditions in the reaction process, is not suitable for large-scale production, and needs a large number of organic solvents, causing some pollution to the environment. In addition, if the noble metal particles are loaded by the impregnated method, this “outside to inside” approach will inevitably lead to a part of the holes being blocked, and thus the specific surface areas will decrease significantly. Moreover, the distribution of metal particles is uneven, and the bonding strength of oxide and metal is relatively weak.
- The technical problems solved by the present invention is that the noble metal nanoparticles are formed in-situ in the nano-porous oxide by the method of the decomposition of the oxide precursor, which overcomes the defects such as the low porosity and uneven composition caused by the template method and the dealloying method, and obtains the oxide-based composite material having good uniformity, simple process, good catalytic performance.
- The technical solution of the present invention is as follows:
-
- a method for preparing the nano-porous oxide-noble metal composite material by deoxidation, comprising the steps of:
- S1: based on the weight components, 0.1243-1.243 parts of the noble metal ions or particles (e.g., silver nitrate, gold nanoparticles), 3.9484-4.5559 parts of the oxide salt to be dissolved (e.g., copper nitrate, etc.), 2.8148-3.7835 parts of the target oxide salt (e.g., cerium nitrate, zirconium nitrate, etc.) are dissolved in 200 ml of ultrapure water to form a mixed solution, and into which 0.2-0.25 parts of the surfactant (PVP) is added, followed by stirring magnetically for 5-10 minutes;
- S2: a precipitant is dropped gradually in the mixed solution, forming the precipitation, and continuing to drop until the precipitate is not increasing, and then stirring for 4 h, and the precipitate is centrifuged and washed, is dried at 80-85° C. for 12 h, then grounding it, calcining at 500-800° C. of high temperature for 2 h in the air atmosphere, which forming a variety of oxides complex containing noble metal;
- S3: the said complex is sufficiently etched with an etchant, dissolving a part of the oxides, reserving the noble metal and the target oxide, separating and washing it, drying at 80-85° C. and heat treating at 400° C. after complete reaction, to obtain the nano-porous noble metal composite material. The resulting porous composite material is an oxide matrix, and whose noble metal content is 1 to 30 wt %.
- Further, in the above solution, the noble metal is silver, gold, platinum and palladium.
- Further, in the above solution, the target oxide is cerium oxide, zirconium oxide, titanium oxide, lanthanum oxide and the like.
- Further, in the above solution, the dissolved oxide is copper oxide, aluminum oxide, iron oxide and the like.
- Further, in the above solution, the surfactant is 2 wt % PVP.
- Further, in the above solution, the precipitant is a sodium hydroxide solution, and the sodium hydroxide solution is prepared by dissolving 3 g of sodium hydroxide in 50 ml of ultrapure water.
- Further, in the solution, the etchant is selected from the group consisting of dilute hydrochloric acid or dilute sulfuric acid, at a mass concentration of 5-6 wt %.
- Further, in the step S3, the XRD analysis phase is used, and if the noble metal participates in the reaction during the etching process, it is necessary to further reduce the noble metal.
- Still further, the reducing method is: dispersing the dried powder in a 2 wt % sodium hydroxide solution, and gradually adding 5 wt % of the glucose solution to an excess, reacting for 4 hours, reducing the noble metal involved in the reaction to produce a simple substance of noble metal, and then proceeding cleaning, drying and heat treating at 400° C.
- The nano-porous oxide-noble metal composite material prepared by the method of the decomposition of the oxide precursor according to the present invention has the advantages of simple operation, low energy consumption and environmental protection, and is suitable for batching, compared with the conventional template method and the dealloying method. The conventional reagents such as sodium hydroxide are used to subside the metal ions, do not need a lot of organic solvents, which also cause the pollution to the environment; dilute hydrochloric acid, dilute sulfuric acid and the like are used during corrosion, which is simple operation, suitable for batch preparation. The composite material itself is well-homogeneous, and the noble metal particles are formed in-situ in the porous oxide, and the interface strength is high. It is possible to avoid the defects, such as the uneven corrosion by the dealloying method and the clogging of holes and the decrease of the specific surface area and the like by the template method.
-
FIG. 1 is XRD spectrums of the complex of CeO2/CuO/Ag before corrosion (a) and after corrosion (b). -
FIG. 2 is a electron photographs of the scanning (a, b) and transillumination (c, d) of the nano-porous CeO2—Ag (5%) composite material prepared according to example 1 of the present invention. -
FIG. 3 shows the catalytic oxidation of CO in performance of nano-porous CeO2—Ag composite material with different silver contents. -
FIG. 4 shows the catalytic oxidation of CO in stable performance of nano-porous CeO2—Ag (10%) composite material with different silver contents for 60 hours. - The present invention will now be described in further detail with reference to the specific embodiments:
- 0.1243 g of silver nitrate, 4.5559 g of copper nitrate and 3.7835 g of cerium nitrate were dissolved in 200 ml of ultrapure water to form a mixed solution, and into which 0.2 g of PVP was added, followed by stirring magnetically for 10 minutes. 3 g of sodium hydroxide was dissolved in 50 ml of ultra-pure water to produce a precipitant, which gradually was dropped in the mixed solution, forming the precipitation rapidly, and continued to stir for 4 h. After the precipitate was centrifuged and washed, it was dried at 80° C. for 12 h. And then the dried precipitate was calcined at 500° C. for 2 h in the air atmosphere to obtain the complex of Ag/CuO/CeO2 The complex was sufficiently etched in 5 wt % dilute hydrochloric acid, and the solution gradually became blue. After separating and washing it, the solution was dried at 80° C. (the XRD indicates that the nano-porous cerium oxide-silver chloride complex was formed). The powder was dispersed in the 2 wt % sodium hydroxide solution, and a 5 wt % dextrose solution was added dropwise to cause an excess. After reacting for 4 h, washing, drying and heat treating the powder at 400° C. produced the nano-porous CeO2—Ag (5 wt %) composite material.
- 0.8772 g of silver nitrate, 3.9484 g of copper nitrate and 3.2791 g of cerium nitrate were dissolved in 200 ml of ultrapure water to form a mixed solution, and into which 0.21 g of PVP was added, followed by stirring magnetically for 10 minutes. 3 g of sodium hydroxide was dissolved in 50 ml of ultra-pure water to produce a precipitant, which gradually was dropped in the mixed solution, forming the precipitation rapidly, and continued to stir for 4 h. After the precipitate was centrifuged and washed, it was dried at 82° C. for 12 h. And then the dried precipitate was calcined at 500° C. for 2 h in the air atmosphere to obtain the complex of Ag/CuO/CeO2 The complex was sufficiently etched in 5.8 wt % dilute hydrochloric acid, and the solution gradually became blue. After separating and washing it, the solution was dried at 82° C. The powder was dispersed in a 2 wt % sodium hydroxide solution, and a 5 wt % dextrose solution was added dropwise to cause an excess. After reacting for 4 h, washing, drying and heat treating the powder at 400° C. produced the nano-porous CeO2—Ag (30 wt %) composite material.
- 0.2953 g of silver nitrate, 4.559 g of copper nitrate and 3.7835 g of cerium nitrate were dissolved in 200 ml of ultrapure water to form a mixed solution, and into which 0.24 g of PVP was added, followed by stirring magnetically for 10 minutes. 3 g of sodium hydroxide was dissolved in 50 ml of ultra-pure water to produce a precipitant, which gradually was dropped in the mixed solution, forming the precipitation rapidly, and continued to stir for 4 h. After the precipitate was centrifuged and washed, it was dried at 85° C. for 12 h. And then the dried precipitate was calcined at 500° C. for 2 h in the air atmosphere to obtain the complex of Ag/CuO/CeO2 The complex was sufficiently etched in 5.5 wt % dilute hydrochloric acid, and the solution gradually became blue. After separating and washing it, the solution was dried at 85° C. The powder was dispersed in a 2 wt % sodium hydroxide solution, and a 5 wt % dextrose solution was added dropwise to cause an excess. After reacting for 4 h, washing, drying and heat treating the poder at 400° C. produced the nano-porous CeO2—Ag (10 wt %) composite material.
- 1.0124 g of silver nitrate, 4.559 g of copper nitrate and 2.8148 g of zirconium nitrate were dissolved in 200 ml of ultrapure water to form a mixed solution, and into which 0.25 g of PVP was added, followed by stirring magnetically for 10 minutes. 3 g of sodium hydroxide was dissolved in 50 ml of ultra-pure water to produce a precipitant, which gradually was dropped in the mixed solution, forming the precipitation rapidly, and continued to stir for 4 h. After the precipitate was centrifuged and washed, it was dried at 85° C. for 12 h. And then the dried precipitate was calcined at 500° C. for 2 h in the air atmosphere to obtain the complex of Ag/CuO/ZrO2. The complex was sufficiently etched in 6 wt % dilute hydrochloric acid, and the solution gradually became blue. After separating and washing it, the solution was dried at 80° C. The powder was dispersed in a 2 wt % sodium hydroxide solution, and a 5 wt % dextrose solution was added dropwise to cause an excess. After reacting for 4 h, washing, drying and heat treating the powder at 400° C. produced the nano-porous CeO2—Zr (30 wt %) composite material.
- 0.1243 g of silver nitrate, 4.5559 g of copper nitrate and 3.7835 g of cerium nitrate weredissolved in 200 ml of ultrapure water to form a mixed solution, and into which 0.21 g of PVP was added, followed by stirring magnetically for 10 minutes. 3 g of sodium hydroxide was dissolved in 50 ml of ultra-pure water to produce a precipitant, which gradually was dropped in the mixed solution, forming the precipitation rapidly, and continued to stir for 4 h. After the precipitate was centrifuged and washed, it was dried at 85° C. for 12 h. And then the dried precipitate was calcined at 500° C. for 2 h in the air atmosphere to obtain the complex of Ag/CuO/CeO2 The complex was sufficiently etched in 5.2 wt % dilute hydrochloric acid, and the solution gradually became blue. After separating and washing it, the solution was dried at 83° C. (the XRD indicates that the porous cerium oxide-silver chloride complex is formed). The powder was dispersed in a 2 wt % sodium hydroxide solution, and a 5 wt % dextrose solution was added dropwise to cause an excess. After reacting for 4 h, washing, drying and heat treating the powder at 400° C. produced the nano-porous CeO2—Ag (5 wt %) composite material. The composite powder was reacted with 0.1% by weight of chloroauric acid and the silver chloride was washed with ammonia to obtain nanoporous CeO2-Au (3 wt. %) Composite.
- 1.0124 g of silver nitrate, 4.5559 g of copper nitrate and 2.8148 g of zirconium nitrate were dissolved in 200 ml of ultrapure water to form a mixed solution, and into which 0.25 g of PVP was added, followed by stirring magnetically for 10 minutes. 3 g of sodium hydroxide was dissolved in 50 ml of ultra-pure water to produce a precipitant, and which gradually was dropped in the mixed solution, forming the precipitation rapidly, and continued to stir for 4 h. After the precipitate was centrifuged and washed, it was dried at 85° C. for 12 h. And then the dried precipitate was calcined at 500° C. for 2 h in the air atmosphere to obtain the complex of Ag/CuO/ZrO2 The complex was sufficiently etched in 5.5 wt % dilute hydrochloric acid, and the solution gradually became blue. After separating and washing it, the solution was dried at 85° C. The powder was dispersed in a 2 wt % sodium hydroxide solution, and a 5 wt % dextrose solution was added dropwise to cause an excess. After reacting for 4 h, washing, drying and heat treating the powder at 400° C. produced the nano-porous ZrO2—Ag (30 wt %) composite material. The composite powder was reacted with 0.1% by weight of chloroauric acid and the silver chloride was washed with ammonia to obtain nanoporous ZrO2—Au (18 wt. %) Composite.
- The XRD spectrums of the complex of CeO2/CuO/Ag before corrosion (a) and after corrosion (b) are shown in
FIG. 1 . As can be seen fromFIG. 1 , the phase structure is CuO—CeO2—Ag complex before corrosion, and mainly containing CeO2 and Ag after corrosion, indicating that the CeO2 based composite material obtained. - The electron photographs of the scanning (a, b) and transillumination (c, d) of the nano-porous CeO2—Ag (5%) composite material prepared according to example 2 are shown in
FIG. 2 , wherein 2a and 2b are photographs of different magnification. It can be seen that the material is a homogeneous porous structure and the pore walls are nanoparticles. It can be seen more clearly from the transmitted photographs ofFIGS. 2c and 2d that it is the micrographs. Where CeO2 is interconnected to construct a porous structure with 10 nm, the microparticles are of about 10 nm. Wherein the Ag nanoparticles are embedded in the porous structure and have a size of about 60 nm. -
FIG. 3 shows the catalytic oxidation of CO in performance of nano-porous CeO2—Ag composite material prepared in examples 1, 2 and 3, and from which it can be seen that the catalytic effect is enhanced with the increasing of Ag content, in which the catalytic effect of CeO2—Ag (10 wt. %) is better, and the temperature of 50% conversion is 131 degrees Celsius. But with the further increase in silver content, low temperature catalytic effect is poor, and the high temperature catalytic effect is not different significantly. -
FIG. 4 shows the catalytic oxidation of CO in stable performance of nano-porous CeO2—Ag (10%) composite material with different silver contents for 60 hours. It can be seen fromFIG. 4 that the CeO2—Ag (10 wt. %) material has no attenuation at 300° C. after 65 hours, indicating that the oxide-based noble metal composite material prepared by this method has a good stability. - While many embodiments of the present invention have been described, it is to be understood that within the scope and spirit of the present invention, other embodiments of the invention and/or variations, combinations and substitutions of the present invention may be made are obvious to one of ordinary skills in the art.
Claims (8)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710124757 | 2017-03-03 | ||
CN201710124757.5A CN106861692B (en) | 2017-03-03 | 2017-03-03 | Oxide removal prepares nanoporous oxide-noble metal composite-material method |
CN201710124757.5 | 2017-03-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20180250660A1 true US20180250660A1 (en) | 2018-09-06 |
US10183278B2 US10183278B2 (en) | 2019-01-22 |
Family
ID=59170399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/626,127 Expired - Fee Related US10183278B2 (en) | 2017-03-03 | 2017-06-18 | Method for preparing the nano-porous oxide-noble metal composite material by deoxidation |
Country Status (2)
Country | Link |
---|---|
US (1) | US10183278B2 (en) |
CN (1) | CN106861692B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114082978A (en) * | 2021-11-29 | 2022-02-25 | 大连大学 | Nano AgSn-SnO2Preparation method of needle-shaped composite powder |
CN114455630A (en) * | 2022-02-28 | 2022-05-10 | 哈尔滨工业大学(威海) | Multi-band composite electromagnetic wave absorption material and preparation method and application thereof |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112007650B (en) * | 2020-08-13 | 2023-02-03 | 石家庄铁道大学 | Method for preparing porous cerium oxide-copper oxide composite material by chemical corrosion method |
CN112246249B (en) * | 2020-10-14 | 2022-10-21 | 石家庄铁道大学 | Porous CeO 2 Chemical corrosion preparation method of loaded perovskite composite catalytic material |
CN112981432B (en) * | 2021-02-05 | 2022-08-09 | 宁波中科科创新能源科技有限公司 | Anode catalyst for preparing ozone by electrolyzing pure water, membrane electrode and preparation method |
CN113182525B (en) * | 2021-04-27 | 2022-07-26 | 安徽工业大学 | Preparation method of nano porous silver powder |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19734974A1 (en) * | 1997-08-13 | 1999-02-25 | Hoechst Ag | Production of supported catalyst for vinyl acetate production |
US6857431B2 (en) * | 2002-12-09 | 2005-02-22 | Philip Morris Usa Inc. | Nanocomposite copper-ceria catalysts for low temperature or near-ambient temperature catalysis and methods for making such catalysts |
US7767610B1 (en) * | 2004-02-25 | 2010-08-03 | Sandia Corporation | Metal nanoparticles as a conductive catalyst |
US7569510B2 (en) * | 2006-02-27 | 2009-08-04 | Philip Morris Usa Inc. | Catalysts to reduce carbon monoxide such as in the mainstream smoke of a cigarette |
US8900420B2 (en) * | 2007-08-20 | 2014-12-02 | 3M Innovative Properties Company | Catalyst production process |
EP2240272B1 (en) * | 2008-01-14 | 2015-12-23 | 3M Innovative Properties Company | Method of making multifunctional oxidation catalysts |
US8431506B2 (en) * | 2009-10-23 | 2013-04-30 | Massachusetts Institute Of Technology | Biotemplated inorganic materials |
CN107413336A (en) * | 2011-03-04 | 2017-12-01 | 优美科触媒日本有限公司 | Exhaust gas purification catalyst, its preparation method and the exhaust gas purifying method using the catalyst |
JP6334411B2 (en) * | 2011-12-21 | 2018-05-30 | スリーエム イノベイティブ プロパティズ カンパニー | Catalyst system |
KR101465299B1 (en) * | 2012-05-25 | 2014-12-04 | (주)엘지하우시스 | Photocatalyst, method for preparing the same and photocatalyst device |
CN103949249A (en) * | 2014-04-11 | 2014-07-30 | 浙江大学 | Catalyst used for gas-fired boiler carbon monoxide selective reduction of nitrogen oxides, and preparation method thereof |
-
2017
- 2017-03-03 CN CN201710124757.5A patent/CN106861692B/en active Active
- 2017-06-18 US US15/626,127 patent/US10183278B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114082978A (en) * | 2021-11-29 | 2022-02-25 | 大连大学 | Nano AgSn-SnO2Preparation method of needle-shaped composite powder |
CN114455630A (en) * | 2022-02-28 | 2022-05-10 | 哈尔滨工业大学(威海) | Multi-band composite electromagnetic wave absorption material and preparation method and application thereof |
Also Published As
Publication number | Publication date |
---|---|
CN106861692B (en) | 2019-09-03 |
CN106861692A (en) | 2017-06-20 |
US10183278B2 (en) | 2019-01-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10183278B2 (en) | Method for preparing the nano-porous oxide-noble metal composite material by deoxidation | |
US11077496B2 (en) | Microwave-assisted carbon template method for preparing supported nano metal materials | |
EP1934384B1 (en) | Coating method of metal oxide superfine particles on the surface of metal oxide and coating produced therefrom | |
CN103007963B (en) | Method for preparing bimetallic nanometer alloy composite material by taking graphene as carrier | |
CN101554664B (en) | Method for preparing nano-scale silver powder | |
CN109675603A (en) | A kind of carbon-supported catalysts and its preparation method and application of silica protection | |
CN110479248A (en) | A kind of preparation method of metal oxide supported monatomic catalyst | |
US10954584B2 (en) | Metal oxide particles and method of producing thereof | |
JP2005526596A (en) | Method for fixing water-soluble nano-dispersed metal oxide colloids as they are | |
EP0363552A1 (en) | Process for preparing metal particles | |
CN109706364A (en) | Intermetallic compound composite material, preparation method and its application | |
JP5142891B2 (en) | Cuprous oxide powder and method for producing the same | |
CN109759133A (en) | Composite material, preparation method and its application of atom dispersion | |
CN108788173B (en) | Hydrothermal preparation method of superfine yttrium oxide doped tungsten composite powder | |
JP2006228450A (en) | Platinum-carbon complex made by having sponge-like platinum nano sheet carried by carbon, and its manufacturing method | |
CN109160544A (en) | A kind of preparation method of rare earth-transition metal composite oxide porous hollow ball | |
CN101433959A (en) | Method for preparing hollow nano gold powder material | |
CN109894610A (en) | A kind of metallic cover spherical casting tungsten carbide powder and preparation method thereof | |
JP2009172574A (en) | Metal particle carrying catalyst and its manufacturing method | |
JP2010089032A (en) | Metal-particle supporting catalyst, and method of producing the same | |
CN109261979B (en) | Preparation method of platinum-gold nanocages and application of platinum-gold nanocages in catalyst | |
CN104483351B (en) | Palladium-doped hollow porous stannic oxide microcubes as well as preparation method and application thereof | |
CN106693962A (en) | Method for preparing dual-precious-metal nanometer catalyst | |
Singh et al. | Porous Core‐Shell Platinum‐Silver Nanocatalyst for the Electrooxidation of Methanol | |
CN103831097B (en) | Nanocatalyst lanthanum strontium manganese oxygen material and its preparation method and application |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SHIJIAZHUANG TIEDAO UNIVERSITY, CHINA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LI, GUIJING;FENG, WENJIE;LIU, JINXI;AND OTHERS;REEL/FRAME:042741/0009 Effective date: 20170601 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FEPP | Fee payment procedure |
Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |
|
LAPS | Lapse for failure to pay maintenance fees |
Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20230122 |